<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
        * {
            padding: 0;
            margin: 0;
        }
        .box {
            width: 500px;
            height: 200px;
            border: 1px solid #ccc;
            margin: 50px auto;
            overflow: hidden;
        }
        ul {
            width: 600px;
            height: 40px;
            margin-left: -1px;
            list-style: none;
        }
        li {
            float: left;
            width: 101px;
            height: 40px;
            text-align: center;
            font: 600 18px/40px "simsun";
            background-color: pink;
            cursor: pointer;
        }
        span {
            display: none;
            width: 500px;
            height: 160px;
            background-color: yellow;
            text-align: center;
            font: 700 100px/160px "simsun";
        }
        .show {
            display: block;
        }
        .current {
            background-color: yellow;
        }
    </style>

    <script>
        window.onload = function () {
            var liArr = document.getElementsByTagName("li");
            var spanArr = document.getElementsByTagName("span");
            for(var i=0;i<liArr.length;i++){
                liArr[i].index = i;
                liArr[i].onmouseover = function () {
                    for(var j=0;j<liArr.length;j++){
                        liArr[j].className = "";
                        spanArr[j].className = "";
                    }
                    this.className = "current";
                    spanArr[this.index].className = "show";
                }
            }
        }
    </script>
</head>
<body>

<div class="box">
    <ul>
        <li class="current">鞋子</li>
        <li>袜子</li>
        <li>帽子</li>
        <li>裤子</li>
        <li>裙子</li>
    </ul>
    <span class="show">鞋子</span>
    <span>袜子</span>
    <span>帽子</span>
    <span>裤子</span>
    <span>裙子</span>
</div>

</body>
</html>